music-codes/dist/isrc.js

Small library for music codes (ISRC, ISWC, UPC)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ISRC = void 0;
exports.parseISRC = parseISRC;
const errors_js_1 = require("./errors.js");
class ISRC {
    constructor(prefix, year, code) {
        if (!/^([a-zA-Z]{2}[a-zA-Z0-9]{3})$/.test(prefix)) {
            throw new errors_js_1.ParseError(`Invalid prefix: ${prefix}`);
        }
        if (year < 0 || year > 99) {
            throw new errors_js_1.ParseError(`Invalid year: ${year}`);
        }
        if (code < 0 || code > 99999) {
            throw new errors_js_1.ParseError(`Invalid code: ${code}`);
        }
        this.prefix = prefix.toUpperCase();
        this.year = year;
        this.code = code;
    }
    first() {
        return new ISRC(this.prefix, this.year, 0);
    }
    last() {
        return new ISRC(this.prefix, this.year, 99999);
    }
    previous() {
        if (this.code === 0) {
            throw new errors_js_1.BoundaryError(`ISRC boundary reached: ${this.toString()}`);
        }
        return new ISRC(this.prefix, this.year, this.code - 1);
    }
    next() {
        if (this.code === 99999) {
            throw new errors_js_1.BoundaryError(`ISRC boundary reached: ${this.toString()}`);
        }
        return new ISRC(this.prefix, this.year, this.code + 1);
    }
    *iterate(up = true) {
        let isrc = this;
        while (true) {
            yield isrc;
            try {
                isrc = up ? isrc.next() : isrc.previous();
            }
            catch {
                break;
            }
        }
    }
    toString() {
        return `${this.prefix}${this.year.toString().padStart(2, '0')}${this.code.toString().padStart(5, '0')}`;
    }
}
exports.ISRC = ISRC;
function parseISRC(isrc, prefix = undefined) {
    const parts = isrc.match(/^([a-zA-Z]{2}[a-zA-Z0-9]{3})([\d]{2})([\d]{5})$/i);
    if (!parts) {
        throw new errors_js_1.ParseError(`Invalid ISRC: ${isrc}`);
    }
    if (prefix && parts[1] !== prefix) {
        throw new errors_js_1.ParseError(`Invalid prefix '${prefix}' for '${isrc}'`);
    }
    const thePrefix = parts[1] ?? '';
    const year = Number.parseInt(parts[2] ?? '', 10);
    const code = Number.parseInt(parts[3] ?? '', 10);
    return new ISRC(thePrefix, year, code);
}
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